Changes to unix(2)

Changes to unix:
commit ecc92abad017cf12d8eb83509d4d57ae14ad47f9
Author: Alain O'Dea <alain.odea@verafin.com>
Date:   Wed Feb 5 21:24:28 2014 +0000

    Handle EROFS/ETXTBSY as permission denied in `fileAccess` (re #8741)

    This extends `System.Posix.Files.`access` to map EROFS & ETXTBSY to
    mean permission denied just like EACCESS.

    Based on a patch by Alain O'Dea and comments by Duncan Coutts

    Authored-by: Alain O'Dea <alain.odea@verafin.com>
    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

commit 4a08984afe5390d91f10f9b1caf7365e6a93595b
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Feb 2 11:03:00 2014 +0100

    Convert `changelog` to markdown format

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>